86 THE CAMBRIAN. 



the south coast in Shclburnc, arc probably continuous inland with 

 those of Annapolis, and thus occupy a much greater area than that 

 represented in my map.* 



I am indebted to Henry S. Poole, Esq., Inspector of Mines for 

 Nova Scotia, for some notes on the distribution of granite bands in 

 the Gold series of the eastern coast. He informs me that granite 

 crosses the Post i - oad from Musquodoboit, five miles from the 

 junction of Pictou, Halifax and Guysboro' counties. It also occurs 

 at Liscomb Lakes, south of the west branch of St Mary's River, and 

 in the hills west of Mooseland, between Mooseland and the shore. 

 It appears to extend from Mooseland to the north-eastern corner of 

 Ship Harbour, and also occurs at Sheet Harbour. Mr Poole agrees 

 with me in regarding the granites as intrusive, and mentions the 

 tongues or veins extending into the gneiss, the fragments of slate and 

 quartzite caught up in the granite, and the development of chiastolite 

 in the vicinity of the granite masses, as corroboration of this. 



It may be well to explain here that in designating the granite as 

 igneous and intrusive, I by no means wish to declare myself against 

 those theories of its origin which would regard it as consisting of 

 indigenous rock fused by aqueo-igneous agency in place, or nearly 

 so. I have referred to this question in Acadian Geology, pp. 

 500, 501, and my views regarding it still remain the same. 



I may further remark that, independently of the stratified character 

 of gneiss, Plutonic granite has always, in so far as my experience 

 extends, a different texture, quite manifest to an experienced eye, and 

 dependent, I believe, chiefly on the more regular forms and inferior 

 density of the crystals of felspar in granite as compared with gneiss. 



Mr Fletcher, of the Geological Survey, has discovered, in certain 

 beds near St Andrew's Channel, Cape Breton, fossils which probably 

 belong to the Cambrian series, and are apparently newer than 

 the Acadian or Menevian group. They consist, according to Mr 

 Billings, of an Obolella, Orthisina, and Dictyoncma, and a trilobite 

 of Primordial type; and the beds holding the Lingula or Obolella 

 are very like the Lingula shales of St John. The series is charac- 

 terized as consisting of a purple, red, and green slate, sandstones 

 and limestones, with beds of felsitc.-j- It thus differs in character 

 from the Acadian group, as developed at St John, and also from the 

 Cambrian of the Atlantic coast of Nova Scotia. It rests on the 

 crystalline rocks of the Boisdale Hills, referred to under next head, 

 which must thus be Lower Cambrian or Huronian. 



' Report <>f1870. 



f Report, Geological Survej, 1875-76. 



